Speed Optimizations

[NateWickstrom]

Two recommendations to make things faster.

1. Gzip the bins and then unzip during download. The downloadFile function in the IPFSDaemon would look like:

   val zipped = responseBody.source()
   val source = GzipSource(zipped)
   
   val buffer = Okio.buffer(Okio.sink(getBinaryFile()))
   
   var total = 0L
   var cnt = 0L
   
   do {
       cnt = source.read(buffer.buffer(), 1024)
       total += cnt
   
       val size = cnt / 1024
       progressDialog.setMessage("$size kB")
   } while (cnt > 0)

   https://github.com/ligi/IPFSDroid/blob/master/app/src/main/java/org/ligi/ipfsdroid/IPFSDaemon.kt#L74-L88

2. Compile the bins with target android-21: xgo -go 1.8.3 --targets=android-21/* ./cmd/ipfs, so you get the additional arm64 bin, which is way faster when applicable (most newer devices):

[ligi]

Thanks for the suggestions! Sorry I did not see this earlier - especially 2 souds like a great idea!

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